[9.x] Improve EventFake::assertListening() support for subscribers (#42193)

* Add tests

* Update SupportTestingEventFakeTest.php

* Assert correct listeners

* Create ArraySubscriber.php

* Create NonHandleMethodSubscriber.php

* Support non-standard event subscriber handle methods

* Apply StyleCI changes

* Remove the array listener transform

Should fix prior test (but doesn't break functionality - only highlights that the other test is perhaps overly strict?)

* Remove unnecessary stub

See `tests/Integration/Events/EventFakeTest.php`

* Remove redundant stub

See `tests/Integration/Events/EventFakeTest.php`

* Remove redundant tests

* Add test for string listener in subscriber

* Fix assertion

* Handle assertions where the method isn't explicit

* Style CI

Author: simonhamp

src/Illuminate/Support/Testing/Fakes/EventFake.php

@@ -62,8 +62,12 @@ public function assertListening($expectedEvent, $expectedListener)
             $actualListener = (new ReflectionFunction($listenerClosure))
                         ->getStaticVariables()['listener'];
 
-            if (is_string($actualListener) && Str::endsWith($actualListener, '@handle')) {
-                $actualListener = Str::parseCallback($actualListener)[0];
+            if (is_string($actualListener) && Str::contains($actualListener, '@')) {
+                $actualListener = Str::parseCallback($actualListener);
+
+                if (is_string($expectedListener) && ! Str::contains($expectedListener, '@')) {
+                    $expectedListener = [$expectedListener, 'handle'];
+                }
             }
 
             if ($actualListener === $expectedListener ||

tests/Integration/Events/EventFakeTest.php

@@ -138,6 +138,7 @@ public function testAssertListening()
         Event::assertListening('event', PostAutoEventSubscriber::class);
         Event::assertListening('event', [PostEventSubscriber::class, 'foo']);
         Event::assertListening('post-created', [PostEventSubscriber::class, 'handlePostCreated']);
+        Event::assertListening('post-deleted', [PostEventSubscriber::class, 'handlePostDeleted']);
         Event::assertListening(NonImportantEvent::class, Closure::class);
     }
 }
@@ -158,12 +159,21 @@ public function handlePostCreated($event)
     {
     }
 
+    public function handlePostDeleted($event)
+    {
+    }
+
     public function subscribe($events)
     {
         $events->listen(
             'post-created',
             [PostEventSubscriber::class, 'handlePostCreated']
         );
+
+        $events->listen(
+            'post-deleted',
+            PostEventSubscriber::class.'@handlePostDeleted'
+        );
     }
 }